Boring and turning machine.



A.F.NATHAN.

BORING AND TURNING MACHINE. APPLICATION FILED JULY23, 1908.

Patented Mar. 14, 1911.

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A. E. NATHAN. J I BORING AND TURNING MAOHINB. APPLICATION FILED JULY23,1908.

Patented Max:1 1, 1911.

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BORING AND TURNING MACHINE. APPLICATION FILED. JULY 23, 1 9oa.

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A. F. NATHAN. BORING AND TURNING MAGH INE.

APPLICATION 1111,31) JULY 23,1908.

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Patented Mar. 14, 1911.

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TINTTED STATES PATENT OFFICE.

ALBERT F. NATHAN, OF NEW YORK, N. Y., ASSIGNOR TO RUSSELL, BURDSALL &WARD BOLT AND NUT (30., 0F PORT CHESTER, NEW YORK, A CORPORATION OF NEW'YORK.

BORING AND TURNING MACHINE.

Specification of Letters Patent.

Application filed July 23, 1908. Serial No. 444,895.

To all whom it may concern:

Be it known that I, ALBERT F. NATHAN, a citizen of the United States,residing at New York, in the county of New York and State of New York,have invented certain new and useful Improvements in Boring and TurningMachines, of which the following is a full, clear, and exactdescription, such as will enable others skilled in the art to which itappertains to make and use the same.

My invention relates to turning and boring machines and moreparticularly to a machine of this character adapted to form nuts frommetal bars.

One of the objects of my invention is to provide a device of thischaracter in which the torsional strain upon the stock will be reducedto a minimum.

Another object of my invention is to provide a device of this characterin which the boring tool may be rotated at a greater speed than isordinarily done in devices of this character, thereby insuring asmoother cut to the stock operated upon.

Other objects will in part be obvious and in part pointed outhereinafter.

The invention accordingly consists in the features of construction,combinations of elements and arrangement of parts which will beexemplified in the construction hereinafter set forth, and the scope ofthe application of which. will be indicated in the following claims.

In the accompanying drawings there is shown an illustrative embodimentof the invention in which the reference numerals refer to similar partsin the several figures.

Figure 1 is a longitudinal vertical section of my improved turning andboring ma chine. Fig. 2 is a plan view of the same. Fig. 8 is an endview of the machine. Fig. 4- is a sectional view of the mandrel andchuck. Fig. 5 is an end view of the mandrel and collet. Fig. 6 is asectional view taken on the line 66 of Fig. 4. Fig. 7 is a sectionalview taken on the line 7-7 of Fig. 4. Fig. 8 is a sectional view takenon the line 88 of Fig. 1. Fig. 9 is a sectional view of the mechanismshown in Fig. 8 taken at right angles to the view in said figure. Fig.10 is a sectional view of the stock-feeding clutch. Fig. 11 is asectional view taken on the line 11-11 of Fig. 10; and Fig. 12 is a planview of the cam which actuates the stock-holding chuck.

Referring to the several figures 1 represents a suitable frame of anydesired form upon which are mounted the bearings 2 2 within which theshaft 3 is journaled, said shaft carrying a suitable pulley 4L to whichmotion is imparted by means of a belt 5 driven by any suitable means notshown, and also mounted upon said shaft is a pinion 6 engaging with acogwheel 7 secured to the hollow mandrel 8. The bore of the mandrel ispreferably flared at one end to receive the split end 9 of the sleeve 10fitting within the mandrel, said split end being provided with suitablerecesses 11 adapted to receive ribs 12 formed on a collet which ispreferably formed from a plurality of sections 13. The sleeve 10 issecured to a second sleeve 14 slidingly engaging the inner bore of themandrel and provided with recesses 15 with which the inner ends 16 ofthe levers 17 pivoted on the mandrel are adapted to engage and wearingplates 18 are preferably provided, with which said ends of the leversengage, as clearly shown in Fig. 4. The outer ends 19 of said levers areadapted to be engaged by a cone 20 sliding upon the mandrel and providedwith an annular groove 21 with which one end of a forked lever 22 isadapted to engage, said lever being pivoted to the frame as at 23 andhaving its opposite end connected by an extensible link 24 with asliding member 25 adapted to reciprocate within a grooved guideway 26said sliding member having a downwardly projecting roller 27 securedthereto for a purpose hereinafter described.

From the above description it will be understood that as the cone 20 ismoved toward the flared end of the mandrel 8 it will force the innerends 16 of the levers 17 to move toward the rear of the machine therebydrawing the sleeves 14 and 10 within the mandrel, and causing the splitend of sleeve 10 to force the sections 13 of the collet against thestock 28 to securely grip the same and hold it in position within thebore of the mandrel.

Secured to the rear end of the mandrel is a spiral gear 29 adapted tomesh with a second spiral gear 30 positioned at substansuitablefbearings32 32 and provided with av worm 33',meshing with theworm Wheel 3&whichis' secured to a shaft 35 journaled in suitable bearings upon saidframe.

Secured to the frame of the machine and. projecting rearwardly therefromis a rod 36 upon" which a sliding member 37 is mounted, said memberbeing normally forced toward the frame of the machine by means'of asuitable spring 38 surrounding said rod andhaving one of its endsbearing against a nut 39 secured to the outer end of the rod The upperend of said" sliding memberisprovided with a bushing 40 having a'horizontal bore formed therein, the forward portion of which is slightlyflared to receive thedogs 4:1 41, which may be retained in position byany suitable means. As shown they are so retained by means of bolts 42secured thereto and having their heads 43 engaging suitable recesses 44;

formed in said bushing, all of which is clearly shown in Fig. 101 Thedogs, which preferably have their clamping faces 45 roughened orserrated. are normally forced in tlneir inner positions by means of therings 46which engages theirouter ends and isslidingly' mounted upon rods417 and normally forced into engagement with the dogs by means of thespring 48 surrounding said rods and engaging nuts 19 secured thereto.

Projecting downwardly from said sliding member is a roller 50 adaptedtobe engagec by, a segmental cam 51 secured to the shaft 35. These partsare so arranged that, as the shaft 35 rotates, the segmental cam 51 willengage the roller v50 thereby forcing the sliding member to moverearwardly against the tension of spring 38 whereby the dogs 41 will bemoved to grip another portion of, the bar or stock, and as said campasses out of engagement with the roller the spring will force thesliding member into its normal'or innermost position, thereby feedingthe stock forward a certain distance,

' depending upon the length of throw of said sliding member.

' Rigidly mounted upon the shaft 35 is a member 52 provided with a camgroove 53 which, as said member rotates, is adapted to engage the roller27 secured to the sliding member 25 to cause said slide to reciprocatein its guideway 26,- thereby swinging the lever 22 upon its pivot andcausing the cone 20 to move toward the rear of the machine a certaindistance, and thento move back to, occupy its normal position. Therelative positions of the segmental cam 51 and the member 52 upon theshaft 35 are such that the cone 20 will be in its rearmost positionthereby freeing the section 13 of the'collet from the stock at thesame-time that'the sliding member 37 is moved toward the frame fltmachine t re py n r alnosition,

whereby the stock may be fed forward the required distance and when thesliding member reaches itsnormal position the cone will again be forcedforward, thereby drawin the sleeves toward the rear of the mandre andcausing the split end of the sleeve 10 to force the collet into intimatecontact with the stock in the manner described above. A stop 95 ispreferably provided to limit the forward movement of the stock, whichstop may be adjustably. mounted upon the rod 54 which is mounted uponthe frame in any suitable manner, and which may be provided with anopening in which a bushing 55 may be secured to provide a bearing forthe boring tool 56 hereinafter described. While I have shown this stopas applied to the machine I have found that the machine will operatewithout the use thereof in a highly satisfactory manner. Tool stocks 57are mounted upon the frame at either side of the mandrel 8 and betweensaid mandrel and said stop 95, said tool stocks being adapted toreciprocate upon the frame of the machine in a horizontal direction andcarrying cutting tools 58 adapted to engage with the stock as indicatedin Fig. 8. Said tool stocks are reciprocated by means of racks 59secured to their under sides with which engage'the pinions 60 mountedupon shafts 61, said shafts also having secured thereto segmental gears62 engaging the double rack 63 to the lower end of which is secured a.roller 64 adapted to engage a cam groove 65 formed in the cam disk 66secured to the shaft 35. This cam groove is so shaped as to cause saidtool stocks to advance slowly toward the stock to cut the same and topermit said tool stocks to be retracted rapidly by means of the springs67 engaging a cross-head 68 secured to the spindle of the double rack 63and sliding upon rods 69 as plainly shown in Figs. 8 and 9.

The parts thus far described are all quite oldand well known in the art,and are all mere matters of mechanical construction within the ordinaryskill of the machine designer, being merely shown for the purpose ofaffording a better understanding of my invention, in which theseold'elements have been brought into a new combination with otherelements, thereby producing new results and functions.

The boring tool 56 is secured within a spindle 70 which in turn issecured to the sleeve 71 rotatably mounted within the bearing 72 andhaving a pulley 7 3 secured thereto adapted to be driven by a belt 74which in turn isdriven by any suitable mecha-' threaded as shown at 78and with which the threaded member 79 engages, said member beingprovided with suitable handles 80 by which it may be rotated in order tocause the split end to grip the inner sleeve 75. The sleeve 76 ismounted to reciprocate within the bearing 81 and is provided on itsunder side with the rack 82 with which-the pinion 83 secured to theshaft 84 engages, which shaft is adapted to be rotated by means of anarm 85 secured thereto, to the opposite end of which a link 86 issecured, the other end of said link being pivoted to a slide 87 mountedto reciprocate within the grooved guideway 88 and carrying a downwardlyprojecting roller 89. A cam member 90 secured to the shaft 35 is adaptedto engage said roller and is so shaped as to provide a slow feed of thesleeve 76 and the tool carrying spindle toward the stock, and a quickreturn movement thereof, said return movement being accomplished throughthe agency of the weight 91 to which the cord 92 is secured, whichpasses over a suitable pulley 93 and is secured to the slide 87 asclearly shown in Fig. 1. The pulleys 4 and 73 and the driving mechanismtherefor are so proportioned and arranged that the boring tool will berotated at a greater speed than the mandrel and in the same directiontherewith, and in practice, I have obtained highly satisfactory resultswhen a boring tool having a diameter of about of an inch rotates at therate of 718 revolutions per minute and the stock having a diameter ofabout 1%,- inches opposite the cutting off tools rotates at the rate of18S revolutions per minute, although, of course, I do not wish tobelimited to these exact figures.

The operation of the device will now be clearly understood. After thestock has been inserted in position the machine is started up and theboring tool will be fed toward and into the stock by the mechanism abovedescribed and at the same time the cutting tools which have theircutting edges in opposition to the movement of said man drel and also tothe movement of said boring tool, will be advanced toward the stock andcut the same as said boring tool is operating. Vhen the end portion ofthe stock has been bored and cut from the main portion in the mannerabove described, the boring tool and cutting tools will be withdrawn andat the same time the cone 20 will be retracted to permit the collet tobecome dis engaged from intimate contact with the stock and the slidingmember will also be retracted to allow the dogs to grip the stock at afresh portion thereof. As the operation continues the sliding memberwill be forced forward again to feed the stock through the mandrel inorder to present a fresh portion thereof to the boring and cuttingtools, and

as said sliding member assumes its normal position the cone will bethrust forward to cause the levers to draw the sleeve within themandrel, thereby again forcing the collet to firmly grasp and hold thestock, as already described, at which point in the operation the boringtool and cutting tools will again advance toward the work and theoperation above described will be repeated.

In order to vary the longitudinal movement of the spindle carrying theboring tool, I have provided the outer end of the arm 85 with a seriesof holes 94 with any one of which the end of the link 86 may esgage.

By constructing a machine of this character in which the boring tool andthe stock revolve at different speeds in the same direction, and withthe cutting tools arranged with their cutting edges in opposition to thedirection of rotation of the drill, I have found that the torsionalstrain upon the stock is considerably less than when the parts rotate inopposite directions or where one part rotates and the other part remainsstationary, as the result of which the machine works smoother and thecompleted product is in a more finished condition than when made inmachine of the old type.

As many changes could be made in the above construction and manyapparently widely different embodiments of this invention could be madewithout departing from the scope thereof, it is intended that all mattercontained in the above description or shown in the accompanying drawingsshall be interpreted as illustrative and not in a limiting sense. It isalso to be understood that the language used in the following claims isintended to cover all of the generic and specific features of theinvention herein described and all statements of the scope of theinvention which, as a matter of language, might be said to falltherebetween.

Having described my invention, what I claim as new and desire to secureby Letters Patent is:

1. A nut-blank making machine comprising, in combination, a rotatablemandrel adapted to hold the metal stock, a rotatable boring tool inalinement with said mandrel and adapted to operate upon said stock, andmeans for rotating said boring tool and said mandrel in the samedirection and at different speeds.

2. A nut-blank making machine comprising, in combination, a rotatablemandrel adapted to hold the metal stock, a rotatable boring tool inalinement with said mandrel and adapted to operate upon said stock,means for rotating said boring tool and said mandrel in the samedirection and at different speeds, and a cutting tool adapted to cutapertured nut-blanks from said stock and ously in the same direction andat a greater speed than the speed at which the stock is rotated, andsimultaneously advancing said boring tool axially into the end of saidstock. V w

4. The method herein disclosed of making nut-blanks which comprisesrotating a metal stock in a given direction and at a given speed,rotating a boring tool continuously in the same direction and atagreater speed than the speed at which the stock is rotated,simultaneously advancing said boring tool axially into the -end of saidstock, and advancing a cutting tool against said stock in a plane normalto the axis of rotation of the stock and at a distance from its free endsubstantially equal to the thickness of the required blank. v

In testimony whereof I afiix my signature, in the presence of twowitnesses.

ALBERT F. NATHAN.

Witnesses:

H. M. SEAMANS, PAUL. A. WOLIF.

Copies of this patentmay be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

